/Engine/Source/Runtime/RenderCore/Public/RenderGraphBuilder.h
Queues a pooled render target extraction to happen at the end of graph execution. For graph-created textures, this extends the lifetime of the GPU resource until execution, at which point the pointer is filled. If specified, the texture is transitioned to the AccessFinal state, or kDefaultAccessFinal otherwise.
void QueueTextureExtraction ( FRDGTextureRef Texture, [TRefCountPtr](API\Runtime\Core\Templates\TRefCountPtr)< [IPooledRenderTarget](API\Runtime\RenderCore\IPooledRenderTarget) > * OutPooledTexturePtr, ERHIAccess AccessFinal, ERDGResourceExtractionFlags Flags )